Michael Jackson trial: Audio tape played in which pop star slurs about 'pain' of his childhood

The audio clip was recorded just one month before Michael Jackson died. (GENE BLEVINS)

LOS ANGELES — A slurring and often unintelligible Michael Jackson mourned his lost childhood and laid bare his "pain" in an eerie four-minute recording played in its entirety for jurors Wednesday.

Prosecutor David Walgren revealed the shocking recording's existence last week when he played a snippet and told jurors it was made a month before Jackson's death by the personal physician now accused of killing him.

Jackson, 50, discusses his upcoming comeback tour and says he wants to open a children's hospital with a movie theater and a game room to help the "angels" of the world.

"I love them. I love them because I didn't have a childhood. I had no childhood. I feel their pain. I feel their hurt," Jackson mumbles so softly that prosecutors had to provide a written transcript. "Heal the World, We are the World, Will You be There, The Lost Children. These are the songs I've written because I hurt, you know. I hurt."

The recording, retrieved from Murray's smart phone with a time stamp of May 10, 2009, provides a "taste" of Murray's history with the singer, prosecutors said.

Prosecutors claim Murray gave Jackson the surgical-strength anesthetic propofol as a sleep aid on June 25, 2009 and then "abandoned" his bedside without proper monitoring equipment to make personal calls and peruse emails.

A forensic expert told jurors Wednesday that screenshots archived on Murray's phone show he was reviewing emails shortly before the superstar took his last breath that day.

The messages touched on an insurance policy for Jackson's upcoming tour and the name Omar Arnold, a pseudonym Jackson used with doctors.

Murray admits he gave Jackson propofol — saying the singer referred to it as "milk" — over a two-month period to treat his insomnia. Propofol has no established use as a sleep aid in a private bedroom, doctors have testified.

Murray's lead defense lawyer said in his opening statement that his client was weaning Jackson from his addiction to propofol and only gave him a small dose – not enough to kill him – the morning he died.

Lawyer Ed Chernoff said the small dose would have cleared Jackson's 136-pound body in a matter of minutes.

Chernoff contends Jackson woke while Murray was out of the room and self-administered enough extra propofol to create a "perfect storm" that killed him "so instantly he didn't even have time to close his eyes."